Book excerpt: Antipsychotic Long-acting Injections (LAIs) were introduced in the 1960s to improve treatment adherence in schizophrenia. Subsequently, first-generation antipsychotic LAIs became widely used in many countries. Since the initial publication of Antipsychotic Long-acting Injections in 2010, new trial data have been published on long-acting injection (LAI) preparations of the drugs Risperidone, Paliperidone, and Olanzapine. Furthermore, a new LAI preparation of the drug Aripiprazole has recently been approved for clinical use in the United States and is likely to be approved in Europe soon. The second edition of this successful book has been fully updated to include this new data, with reference to both observational studies and randomized controlled trials, as well as other new developments in the clinical use of antipsychotic LAIs. New chapters have been added covering the comparison between oral and injectable antipsychotics, Olanzapine LAI, Aripiprazole LAI, and the practicalities of organizing a specialized clinic for long-acting injectable antipsychotics. Existing chapters have also been thoroughly updated to take into account the most recently published research. Antipsychotic Long-acting Injections, Second edition brings together clinical and research findings on LAIs in a comprehensive volume, with chapters written by international experts.